Pink Lady’s Slipper (Cypripedium acaule) September 18, 2019 1500 × 1200 NY Wildflowers Gallery Pink Lady’s Slipper (Cypripedium acaule). Orchidaceae family. Native. Acidic woodlands, often with pine. Throughout. This individual growing beneath pitch pines. Associated with Starflower. Napeague, Long Island, May 2019.